Hello,
I have a nice function that makes an image of an matrix
e.g.:
qt[1:3,1:3]
rs655246 rs943795 rs955612
rs655246 NA NA NA
rs943795 9.610070e-04 NA NA
rs955612 5.555616e-05 7.915982e-07 NA
myimage <- function(x, cex.axis = 0.7, ...){
opar <- par(mar=c(5,4,4,6),
pty ='s')
on.exit(par(opar))
image(x, axes = FALSE, ...)
ats <- 0:(nrow(x)-1)/(nrow(x)-1)
axis(1, at=ats, lab=rownames(x), cex.axis=cex.axis, las=2)
axis(4, at=ats, lab=colnames(x), cex.axis=cex.axis, las=2)
box()
}
The ranges in my matrix are from 1 to 1e-08. But in my image there is no
difference between, for instance 1e-05 and 1e-06 or -07 etc.
How can I ameliorate my function myimage to do so. I guess it has something
to do with breaks but I do not understand how to handle.
Thanks
Hermann
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